Maag presents the new generation of backflush screen changers - revolutionary in its simplicity, high efficiency and cost-effectiveness

The newly-developed CSC-BFX backflush screen changer meets all the demands of direct recycling (such as rPET bottle flakes to films) with just two screen pistons

Oberglatt, (PresseBox) - Conventional backflush screen changers utilize the filtered melt stream to clean the screens and are used primarily on pelletizing lines where the resultant fluctuations in throughput have little effect.

For commercial reasons the recycling industry is increasingly demanding suitable backflush filters for direct processing of recycling material into 1A products (film, fiber, sections, etc.) without the intermediate step of pelletizing.

The Maag CSC-BFX backflush screen changer meets those requirements by storing the backflush material in rheologically optimized conditions in an integrated melt accumulator. In so doing the CSC-BFX cleans the contaminated screen surfaces with no impact on the end-product.

Product Manager Harald Pohl comments: "The entirely new patented backflush filter incorporates only two turn/lift cylinders for the complete filter function. As opposed to other designs with as many as eight hydraulic cylinders, our new generation of screen changers is therefore extremely compact and is easy to integrate into existing extrusion lines with corresponding cost benefits. Another advantage for customers is the diverter valve function. Installed as standard feature it purges the startup melt to the floor when the line starts up."

The backflush screen changer is fully automatic. Its controller, the maaxBFX, provides user-friendly control, monitoring and visualization of operating parameters when handling highly contaminated polymer melt.

Extensive practical trials have been completed, and the backflush screen changer is available now in the standard extrusion sizes with active filter areas from 250cm2 to 3,250 cm2. The new backflush screen changer will also be on show on the Maag stand at the K'2013 in Düsseldorf, Hall 9, A04.

Maag Pump Systems AG

Maag is the worldwide leading manufacturer of gear pumps, pelletizing systems, and filtration systems for demanding applications in the plastics, chemical, petrochemical, and food industries. Maag develops, manufactures, and distributes innovative, customized solutions for complete pump and pelletizing systems - with the expertise based on its long-term industrial tradition since 1910.

The whole company employs more than 500 staff at its headquarters in Switzerland and its production sites and sales offices in Germany, France, Italy, Singapore, Taiwan, Malaysia, China, Brazil, and the USA and is represented in the markets with its brands "Maag Pump Systems", "Automatik Pelletizing Systems", and "Maag Filtration Systems". Maag, a Dover Corporation Company (NYSE:DOV), is a part of the Pump Solutions Group, itself a business unit of Dover Engineered Systems.

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